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| EPoS Contribution |
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The chemical structure of W49A - results from the JCMT Spectral Legacy Survey
Zsofia Nagy Kapteyn Astronomical Institute & SRON Netherlands Institute for Space Research, Groningen, The Netherlands | |
| With a luminosity of L_IR > 10^7 L_Sun and a mass of M > 10^7 M_Sun, W49A is the most active star-forming region in the Galactic disk. By resolving its structure at mm/submm wavelengths, we hope to use it to understand the high star formation rates seen in some external galaxies, such as starburst galaxies. The JCMT Spectral Legacy Survey observed a 2x2 arcminutes field with 15" angular resolution around the center of W49A in the frequency range between 330 and 363 GHz and extended it to 373 GHz. The 345 GHz band contains various molecular lines as tracers of different physical properties like CO isotopes, high density tracers as HNC and HCN, SiO (shock tracer) and CH3OH (grain evaporation). Analysing the spatial and velocity information provided by the survey we aim to understand the physics and chemistry of this region with conclusions on extragalactic starburst sources. The different components with different physical and chemical structure will be probed with a higher angular resolution (1") in a follow-up survey with the SMA. | |
| Collaborators: F.F.S. van der Tak, SRON, The Netherlands M. Spaans, KAI, The Netherlands |
Suggested Session:
Chemistry, Massive Stars |